What taxes when you are reporting under the poverty line ?
People that make $24k or less receive more of a refund than they pay in taxes - about 9% more than they put in. That's not counting other programs that they would be eligible.
The middle class and wealthy support the rest - people simply don't feel like working.
Would this be because of incompetent teachers,
There are many wonderful teachers - but a good portion simply do not care about education. The one's in private schools tend to be more devoted as they're getting a far smaller salary than their counterparts in public schools - nearly half. A green horn public school teacher makes around $52k a year in Chicago. After trying his or her best for 3-4 years, they will frequently move to the suburbs where the pay is far higher. In some suburbs, average pay for a teacher is well above $100k.
I blame teachers unions, lack of charter schools (something the teachers unions fight so hard against), and most of all - common core, which teaches kids about 'real world' things like a false interpretation of the 2nd amendment, forces students to memorize the 5 pillars and write the shahada in calligraphy (effectively makes you a Muslim convert), teaches children about rappers like Twista and pimps, and even has them learning about infidelity and homosexual relations. Poland's education system is higher than the US - I mean that's just sad with the amount of money and bureacracy that is involved in public schools.
A bunch of states, including Texas, Wisconsin, Alabama, etc., are now suing the Obama administration for forcing them to allow students to use whichever bathroom they 'identify' with.